I have flashed me bios a few times and it always recomends you save your exsisting bios to a floppy, there even a utility for doing this.
I have never had any probs flashing a new bios so I have never had to reload the original, but I assume there must be some way of doing it?.
Isn't there a jumper pin on most boards that allows you to dump the bios in the chip?.
Again never had cause to use it.
PS, I updated the bios on a Spacewalker shuttle board from a kind gent not a million miles from here so it would recognise and run a AMD tx 1.5.
Runs that CPU sweet as a nut now it does